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Naoe Hirai

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Mn-Zn ferrite
    • Patent number 5,476,605
    • Issue date Dec 19, 1995
    • TDK Corporation
    • Naoe Hirai
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Purified solution containing iron and manganese, and method produci...
    • Patent number 5,200,159
    • Issue date Apr 6, 1993
    • Chemirite, Ltd.
    • Naoe Hirai
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Method for producing powdered iron oxide
    • Patent number 5,032,367
    • Issue date Jul 16, 1991
    • Chemirite, Ltd.
    • Naoe Hirai
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...